Perhaps you should try some spelling variations:
kien phap » hien phap, dien phap, tieng phap
bien phap » ban phap
khoa hoc » hoa hoc
cao hoat » cac hoat, co hoat, cao chat
hoat hoc » hoa hoc, hoat ho, toan hoc
bach ca » bach cau, bach ha, bach mai
cu cau » cu cao, co cau, cu cu
ca cao » ca dao, cu cao, ca cac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( cu cau ((kien phap) OR (bien phap)) khoa hoc ) or ( vu bach ca cao hoat hoc ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( cu cau ((kien phap) OR (bien phap)) khoa hoc ) OR ( vu bach ca cao hoat hoc )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( cu cau ((kien phap) OR (bien phap)) khoa hoc ) or ( vu bach ca cao hoat hoc ))".
• Adding a wildcard symbol may retrieve word variants: (( cu cau ((kien phap) OR (bien phap)) khoa hoc ) or ( vu bach ca cao hoat hoc ))*.